nordenfelt



(Nb Model.)

. 11 Sheets-Sheet 1. T.- NORDENFELT. I BREBOH MECHANISM FOR ORDNANOB. No. 422,965. Patented Mar. 11, 1890.

11 Sheets-Sheet 2.

.T. NORDENFELT. BRE'EGH MECHANISM FOR ORDNANOE.

(No Model.)

No. 422,965.. ?atented Mar. 11, 1890.

(No Model.) 1-1 Sheets-Sheet 3.

T. NORDENFBLT. BREEOH MEGHANISM FOB ORDNIANGB.

,No. 422,965. Patented Mar. 11, 1890.

(No Model.) 11 Sheets-Sheet 4 T. NORDENFELT. BREBCH MECHANISM FOR ORDNANOE.

PatentedMar. 11, 1890.

IMF.

(1 10 Model l1 Sheets-Sheet 5. T. NORDENPELT. BREBGH MEGHANISM'POR ORDNANGE.

Patented Mar. 11, 1890'.

Ihverzirj (N0 Mode 1.) 11 SheetsS heet 7. T. NORDENPELT.

BREEOH MECHANISM FOR ORDNANOB.

No. 422,965. Patented Mar 11, 1890.

(No Model!) 11 SheetsSheet 8, T. NORDENFELT.

BREEGH MECHANISM FOR ORDNANOE.

No. 422,965. Patented Mar. 11, 1890.

(No Model.)

11 Sheets-Sheet 9. T. NORDENFELT.

BREBGH MEGHANISM FOR ORDNANGE.

- Patented Mar. 11, 1890.

(No Model.) 11 Sheets-Sheet 10.

T. 'NORDENFELT. BREEGH MECHANISM FOR ORDNANGE.

No. 422,965. Patented Mar. 11, 1890.

(No Model.) Q 11 SheetsSheet 11. T. NORDENFELT. BREEGH MBGHANISM POR ORDNANGE.

No. 422,965. Patented Mar.,11, 1890.

UNITED STATES,

PATENT Onricni.

THOR'STEN NORDENFELT, OF \VETMINS'lTER, ENGLAND, ASSIGNOR TO THE MAXIM-NORDENFELT GUNS AND AMMUNITION COMPANY, (LIMITED) OF SAME PLACE.

BREEQH MECHANISM FOR ORDNANCEI;

srncrrrcn' non forming-part of Letters Patent 1 \Tio. 422,965, dated March v11, rseo.

Application filed May 22,1889

T aZZ wh0m it may concern.-

. Be it known that I, THQRSTEN NORDEN- FELT, civil engineer, a subject of the King of- Sweden, residing at -3 Parliament Street, in 5 the city of YVestminster, England, have invented certain new and useful Improvements in Rapid-Firing Guns, of which the following is a specification. v I I My improvements relate to that class of 1'0 rapid-firing guns in which the breech-is locked into the rear end of the barrel by interlocking segments of screw-threads. Such guns have commonly been made with an extractor, which draws back ,the. empty cartridge-cases 5 as the breech-block has been drawn back and the cartridge case has remained projecting partly into the barrel-when .the block has been turned to one side? "Ipi ovide such guns not only with anextractor to draw the'carzo tridge-case back as the breech-block is drawn back, but also with an ejector to throw, out

the case after the block has; been moved away to one side. To effect this I employ an ejector-fingercarried by the rear end of the 'gun- 2 5 and which when the brech-blockis moved away from the breech of the gun is made to turn or move into a position to come in front of the rim of the cartridge-case, and then, when the block is finishing its movement, to

3o clear the breech'is made to turn quickly in a direction tqthrust back therimand 'eject the cartridge-case. In gunsjin which the breech-block when drawn back enters into a ring which-canbe ,turned around an axisat 3 5 one side of it parallel with. the bore of the gun, I preferably make thisfinger to form one arm. of aleventheaxis-of-which is formed of a portion of a'sphere projecting froni'it and entering a cup recess in the rearend of 40 the gun, so that the lever can be turned on a universal joint. The tail end of. the lever I form with a projection upon it to enter a groove formed in the front face of thefringf used for carrying the breech-block when it 4-5 is drawn back. The groove is soshaped that Serial No. 311.710.. a; motel) and then, when the breech-block has been carried aside clearof the rear end of the car; 'tridge-case, the lever is, by the formation of the groove, caused to turn quickly in a direction to cause it to throw back and eject the empty cartridge-case.

To turn the breech-block to lock and unlock at side of the cartridge-case andbring it in front of thc rim which is around its rear end,

block or be turned down to lie flat against the end. When in this latterp'osition, the gun can be fired. When it is being turned into the former position, I cause it by a hookpiece on its axis-todrambackrthe tiring-pin or striker of the firing mechanism until this firing-pin is caught by a sear-lever.

The firing-pin is held back by the hooli until the handle isagain turned down fiat -The firing7pin is then only held back by; the

seari: *Any suit-able arrangement of mecha n ism may be usedfor tripping the sear when the gun is tobe fired; ',Preferably I makef the tail of the sear to rest against a pin which 7 liesin a hole formed radially into one side of the breech-block. \Vhen the breech-block is turned into its locked position, the outer end of this hole comes opposite to a pin which lies in a radial hole at one side of the rear end of the gun. Normally this pin is pressed outward by a spring; but when the gun is to' i be fired it can be pressed inward by acrank vlever caused to press upon it by the pulling of a cord attached to the lever, or in other suitable ways. The inner end of the pin then presses. against the pin which rests on the sear and pressing it inward disengages the'sear from the striker, and. the striker 'is' then thrown forward by its spring and its front end ignitesthe cartridge-primer.

."Cartridge-ejectors and firing mechanism arranged as-above described are applicable to bther forms of breech mechanisms in which the breech-block islocked withinihe breech by divided segments of screw-threads. 1 Inth'e ,drawingsannexedl have shown my improvements appliedto a gun'in which the breech-block is formed with spiral segments of ;screw t hreads upon it to interlock with corresponding segments in the gun and in whichthe breechbl'oek is'fwithdrawn into a -carrier-ring-Pby'giving to it-' a turning,-move- V ment, and is then carried to-one' side by the ringbeing eausedto turnaround an axis .Which'i's'parallel; with-the bore of the gu'nl,

the line'2 2 of Fig. 2, showing particularly the .inclined edge-on the arm of the breech-block carrier. -Fi-g. dis a longitudinal section through the line a bL; :Fig; 4, a section through the line c d; Figy-fifa sect-ion through the line-'e f, all-on Fig. 1. Fig. is a cross-section of the breech-blookthrough the line g h, Fig? 3.

' Fig Tis a section through thelinej, Fig; 2. Fig. S 'is-a rear elevation of the breech-bloek carrier or'ring. Figs. '9 and-l0 are sections of the same on the lines!) 9 and 10 10, respectively, of Fig. 8. Fig. 11 is a plan of the han dle and claws-for operating the firinq-pi'n.

' Seaman its springs., Figsli) and 20 are ele- 'Fig. 12 isasectionof the same. Fig. l. isa. side elevatiomofthe.firing pin; Fig. 14 alon adrenal-season, and Fi 23i;l5 a rear elevation,

.-of the same; Fig. 16 a rear elevation, Fig. 17

a side elevation, and-Fig. 18 a plan, of the vatlbns of thegbneech-block; Fig. 21- is 3. diagram plan showingtheinterior of'the breech ofthe"gnndeveloped with the extractor in and Fig. 25 a plan.

e in'ifihg rear end of the gun. It'has'alsoz ew=threads upon it into'which some of the screw-threads of one of the screw-segments of .thebreech-block interlock when the breech place.

tractor travels. Figs. 23, 24, and 25 are detail views of the extractor detached-Fig. 23 is a side elei atioin-hig. 24 is'a rear. elevation,

A isithe" breech end 0, the carrier-ring; D, the axis a'round which it" can be turned.

sli

baokwardvand forward in a spiral groove block has been turnedintoa position for the vscrew-segments upon it to be disengaged from a-the screw-segments. in the gun,so that when the breech-block is drawn I back the extractor goes back with it.

F is a roller carried by the ring and en 7 tering a groove G in the side of the breechblock. 'lhejfor n of the groove is shown in Fig. 3.

So far the gun is constructed in the manner described in the specification of a former Fig.2.? is a section and shows the deeper groove in the gun in which the exotthe body of the gun;

' tion in which it is patent granted tome, dated August 28, 1888, No. 388,576, v r

H is the ejector-lever, turning on a balhandsocket joint at H. I I

H is a'projection on its tail end, entering :a groove 0 in the frontface of the ringC.

the ring C. j C is a projection on the front face of this end of; the gun when the breechis opened. The'edge G of the arm is formed to incline backward, as shown at Figs. 1, 2,and 8. When has been inserted'into it so far as the ejectornng'e win perinit ot" its being inserted th'at *is, until the rim of the cartridge comes againstthe finger-end when the earlier-ring is again on the arm comes against the rear end of the level with the face of the breech-block5 sothat the breech-Mock can pass behind it.

I is the'firingpin, lying in a central passage vformed 'longitudihally through the breechblockl' It is formed with a hollow cylindrical stein I, the rear-end of which passes intoa corresponding'cavity in a 'blockBQ' which closesthe rear end of the passage thronghthe breech block. The" stem 1' has two'lngs I block '13 is square on the exterior and fits is held in its cocked drawn back. N is a pin lfi'ing position when it has been which the sear can .betrip'ped whenever the breech-block has been turned into the posisecurely locked within the breech. I Y

The handle-K has eccentric hooksorclaws K formedwith it, which pass into cavities at two opposite sides of the block 13, and which, when'the handle is turned to make it stand outward away from the end of theblock, hook is an arm standing. out from one side of:

the-breech has been opened and a cartridge turned to the left to bring the breech-blocks into position to close the breech, the'inehne projecting from it,- wh'ich enter corresponding: groeyesfin thesides-of the cavity in thehloeln-i B'andkeep thefii'ing-pin from turning. The

into the rear end of-the passage through the breech blocir, which is of corresponding form.-

a radial hole in the breech-block and-resting against the tail end ,of the sear-lever. i 1 -.E-;'is the extractor, made capablc'of being spring pressing-this pin ont arm, which comes against a stop A on the cartridge and presses it forward "nntilit is M is the sear-lever, by which thefiringin pin N. when the breechis Q- is a'crankdever o c arin hf which rests against the-outer .en ot thep'int) and theaotherhas'a' cord attached-to it", by pulling on- 

